This map illustrates satellite-detected shelters and other buildings at the Minkaman IDP Site in Lakes State, South Sudan, as seen by the WorldView-2 satellite on 3 July 2014. People displaced by ongoing instability in the region of Bor have established multiple IDP camps on the west bank of the White Nile in Awerial County. Imagery acquired on 10 May 2014 showed approximately 9,391 shelters and 450 infrastructure or support buildings occupying multiple areas along the White Nile. Imagery also showed an area being prepared for accommodating new shelters. As of 3 July 2014 this ground has been partially covered by shelters as well as other areas of the IDP site, and approximately 13,492 shelters and 572 infrastructure or support buildings have been detected. Note that IDPs sheltering under trees are not detected by this analysis. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR / UNOSAT

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UNOSAT datasets and maps are produced using a variety of methods. In general, analysts closely review satellite imagery, often comparing two or more images together, and determine notable changes between the images. For damage assessments, refugee or IDP assessments, and similar analyses, these changes are then manually documented in the vector data by the analyst. For flood extractions, landcover mapping and similar analyses, a variety of automated remote sensing techniques are used to extract the relevant information which is then reviewed and revised as necessary by the analyst. In all cases, resulting data is then loaded into a standardized UNOSAT geodatabase and exported asshapefiles for dissemination.

Caveats / Comments

This is a preliminary assessment and has not yet been validated in the field. It is important to consider the characteristics of the source imagery used in the analyses when interpreting results. For damage assessments it should be noted that only significant damage to the structural integrity of the buildings analyzed can be seen in imagery, while minor damage such as cracks or holes may not be visible at all. For flood extractions using radar data it is important to note that urban areas and highly vegetated areas may mask the flood signature and result in underestimation of flood waters. Users with specific questions or concerns should contact unosat@unitar.org to seek clarification.